package cn.tedu;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

public class Demo09 {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        System.out.println("请输入用户名");
        String username=sc.nextLine();
        System.out.println("请输入密码");
        String password=sc.nextLine();
        try (Connection conn=DBUtils.getConn()){
        String sql="select password from user where username=?";
        PreparedStatement ps=conn.prepareStatement(sql);
        ps.setString(1,username);
        ResultSet rs=ps.executeQuery();
        if (rs.next()){
            String pw=rs.getString(1);
            if (pw.equals(password)){
                System.out.println("登录成功!");
            }else {
                System.out.println("密码错误!");
            }
        }else {
            System.out.println("用户名不存在!");
        }
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }

    }
}
